CN113470955A - Production process and application of conductive belt with shielding function for power transformer - Google Patents
Production process and application of conductive belt with shielding function for power transformer Download PDFInfo
- Publication number
- CN113470955A CN113470955A CN202110711183.8A CN202110711183A CN113470955A CN 113470955 A CN113470955 A CN 113470955A CN 202110711183 A CN202110711183 A CN 202110711183A CN 113470955 A CN113470955 A CN 113470955A
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- Prior art keywords
- conductive
- production process
- shielding
- conductive belt
- weaving
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000009941 weaving Methods 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims abstract description 14
- 238000009940 knitting Methods 0.000 claims abstract description 12
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 239000004065 semiconductor Substances 0.000 claims abstract description 10
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000003749 cleanliness Effects 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000002040 relaxant effect Effects 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 210000004243 sweat Anatomy 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 13
- 239000011087 paperboard Substances 0.000 description 7
- 230000006872 improvement Effects 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Woven Fabrics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a production process and application of a conductive belt for shielding function of a power transformer, wherein the production process comprises the following steps: selecting materials: selecting one or more of polymer synthetic material, conductive material and semiconductor material; inspecting the line; warping; checking whether the cleanliness and the smoothness of a wire supporting roller, a hump and a wire collecting roller of the machine reach the standard or not; a step of heald and buckle transmission; weaving production; weaving by adopting a multi-heald weaving (knitting) method to obtain a conductive belt or producing and processing the conductive belt into a magnetic plate; installing a finished product in an application range; the shielding conductive belt or the magnetic plate is installed in a proper position of the transformer iron core coil and an available space inside and outside the shell (oil tank) singly or in a matching way by adopting one or more methods of covering, shielding, embedding and hanging. The novel conductive material, the magnetic conductive material and the high polymer material are combined, and the conductive belt and the magnetic plate which have good shielding effect, good permeability and convenient installation are obtained by adopting a multi-heald knitting (knitting) method.
Description
Technical Field
The invention relates to the technical field of power transformers, in particular to a production process and application of a conductive belt with a shielding function for a power transformer.
Background
With the increasing voltage class of power systems, the voltage class and the individual capacity of high-voltage large-capacity electrical equipment (transformers, capacitors, high-voltage combined electrical equipment, and the like) are also increasing.
In any of the insulating structures, including those of high-voltage large-capacity transformers, since the dielectric coefficient of gas is smaller than that of insulating materials such as oil and paper, the electric field strength applied to the air gap is higher than that applied to the oil and paper. When the applied voltage reaches a certain value, the air gaps will first be partially discharged. In addition, partial discharge is also easily generated in an oil film in the oil paper insulation, an oil gap in an oil separator insulation structure, sharp corners and burrs at metal parts, wires and the like, a local region where an electric field is concentrated and the field intensity is too high, and the like. Partial discharge in the insulation structure of the transformer, especially partial discharge generated on the surface of the oil paper insulation with large discharge amount, will damage the insulation of the transformer. Firstly, the discharge mass point directly bombards the insulation to cause the damage of local insulation, and the damage is gradually enlarged until the whole insulation layer is discharged and broken down; secondly, due to the electrochemical action of heat generated by partial discharge, ozone, nitrogen oxide and other active gases, partial insulation is corroded, the electric conductivity is increased, and finally insulation thermal breakdown is caused. In a word, the damage of the local discharge to the insulation finally causes the insulation life of the transformer to be reduced, and the safe and reliable operation of the transformer under the action of long-term working voltage is directly influenced. Therefore, shielding the discharge source, reducing the discharge amount and safely operating wires and cables of high-voltage electrical equipment are particularly important.
At present, the transformer is generally electrically shielded in a mode of combining an insulating paperboard with a copper foil. The disadvantages are that:
the shielding material 1 has no three-dimensional supporting strength and is easy to deform. Resulting in difficulty in installation.
2 the shielding paper board has no circulation oil duct, the heat conductivity is low, and the temperature rise limit value is influenced.
3 the shielding paper board has poor attaching performance, so that the effective shielding area is small and the shielding effect is low.
4 the shielding paperboard is fragile and easy to damage in the using process.
5 the bonding of the shielding paperboard is delayed, resulting in easy separation of the paperboard and the shielding material, resulting in functional failure.
6 the shielding paperboard is made by hand, and the deviation is large.
7 the handling process is susceptible to damage and contamination.
In order to solve the technical problem, a production process and application of a conductive belt for a shielding function of a power transformer are provided.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the technology, and the invention provides:
a production process and application of a conductive belt with a shielding function for a power transformer are disclosed, wherein the production process specifically comprises the following steps:
the method comprises the following steps: selecting materials: selecting one or more of conductive material, semiconductor material and polymer synthetic material;
step two: inspecting the line; detecting the special metal material by using a detection instrument, wherein the detection range comprises the thickness of the wire diameter and the soft and hard tension indexes, and according to the requirements of the size and the magnetic flux of the transformer, conductive belts with shielding functions and plates with various specifications are made for transformers with different materials, different wire diameters and different densities;
step three: warping; selecting bobbins with consistent wire diameters and consistent tension from the qualified wire rods detected in the step two for warping, keeping the tension of each bobbin the same in the warping process, keeping a tension roller smooth, rotating flexibly, and avoiding friction in the warping link to generate metal powder;
step four: checking whether the cleanliness and the smoothness of a wire supporting roller, a hump and a wire collecting roller of the machine reach the standard or not;
step five: a step of heald and buckle transmission; in the process of heald and buckle delivering, the weaving line runs smoothly on the weaving machine, and the phenomena of line pressing, diagonal pulling, line fixing and knotting are avoided;
step six: weaving production; a multi-heald weaving (knitting) method is adopted, and a loom interweaves warps and wefts in production according to a certain rule; weaving the original warp and weft into multi-layer, reciprocating and knitted shielding conductive bands or producing and processing magnetic plates with various specifications;
step seven: mounting a finished product; the shielding conductive band or magnetic plate is installed in the proper position of the iron core coil of the transformer and the available space inside and outside the casing (oil tank) by one or more of covering, shielding, embedding and hanging methods.
As an improvement, the shielding conductive belt can be made by selecting conductive fibers to be woven by blended yarns.
As an improvement, a conductive material, a semiconductor material and a high polymer synthetic material are simultaneously selected and twisted into the conductive belt through the production process.
As an improvement, a conductive material, a semiconductor material and a polymer composite material are respectively selected and woven into a shielding conductive belt through the production process, and the shielding conductive belt obtained by weaving the three materials or magnetic plates with various specifications are arranged at a proper position of an iron core coil of the transformer and in available space inside and outside a shell (oil tank).
As an improvement, in the second step, in the multi-heddle (knitting) method, it is required to ensure that the tension of each thread is consistent during the warping, heddle transferring, knot transferring and knitting processes, and no broken warp exists;
a. in the production process, the mechanical intelligent monitoring avoids the occurrence of net body hard damage, crease marks, double lines, jumper wires, lack of warps and wefts, bulges, depressions, grooves, edges, sundries, oil stains, sweat stains and edge cracks at two sides, avoids sharp corner discharge and improves the product quality;
b. relaxing the meridians: ensuring that no net surface is higher than the net surface, so that the hole on the net surface is deformed and no parallel loose warps exist;
c. reversing the lines: the reverse line is required to be smooth and have no edge;
d. let-off: the weft delivering and cutting are both regulated by a servo motor through a computer, and the weft cutting time is adjusted, so that the weft is better clamped on the rapier head, and the net surface is kept flat;
e. wire sorting: no lines can appear on the surface of the net body.
As an improvement, the installation range of the shielding conductive belt or the magnetic sheet material comprises: the transformer core coil is installed in a proper position of the transformer core coil and available space inside and outside the shell (oil tank) singly or in a matching way.
Compared with the prior art, the invention has the advantages that: the produced conductive tape has the following advantages:
1) the shielding effect is good, the appearance is stiff and wide, the installation is convenient, and the structure is superior to the traditional manually assembled paper and metal pasting structural parts.
2) The permeability is good, increases the oil circuit, possesses the heat conductivility.
3) The shielding area is large because the shielding plate can completely cover at any angle.
4) Because the fabric is formed by weaving, the process is unique, and therefore, the connection is firm. The falling-off phenomenon can be avoided.
5) Various materials are compositely woven, and the functions are diversified.
6) The mechanized production and the computer control can avoid the deviation, the error and the leakage of the manual production, and the product is standardized.
Detailed Description
The following is a further detailed description of the production process and application of a conductive strip for the shielding function of a power transformer.
A conductive belt production process and application for a shielding function of a power transformer are characterized in that: the production process comprises the following specific steps:
the method comprises the following steps: selecting materials: selecting one or more of conductive material, semiconductor material and polymer synthetic material;
step two: inspecting the line; detecting the special metal material by using a detection instrument, wherein the detection range comprises the thickness of the wire diameter and the soft and hard tension indexes, and the magnetic screen belt of the transformer magnetic conduction screen and the magnetic plates of various specifications, which are made of different materials, different wire diameters and different densities, are formulated according to the requirements of the size and the magnetic flux of the transformer;
step three: warping; selecting bobbins with consistent wire diameters and consistent tension from the qualified wire rods detected in the step two for warping, keeping the tension of each bobbin the same in the warping process, keeping the tension roller smooth, rotating flexibly and avoiding friction in the warping link;
step four: checking whether the cleanliness and the smoothness of a wire supporting roller, a hump and a wire collecting roller of the machine reach the standard or not;
step five: a step of heald and buckle transmission; in the process of heald and buckle delivering, the weaving line runs smoothly on the weaving machine, and the phenomena of line pressing, diagonal pulling, line fixing and knotting are avoided;
step six: weaving production; a multi-heald weaving (knitting) method is adopted, and a loom interweaves warps and wefts in production according to a certain rule; weaving the original warp and weft into multi-layer, reciprocating and knitted conductive bands or producing and processing into magnetic plates with various specifications;
step seven: mounting a finished product; the conductive belt or magnetic plate with shielding function is installed in proper position of iron core coil of transformer and inside and outside of casing (oil tank) by one or several of covering, shielding, embedding and hanging methods.
In this embodiment, the conductive fibers may also be selected to be made into the conductive tape by blended yarn weaving.
In this embodiment, the conductive material, the semiconductor material, and the polymer synthetic material are simultaneously selected and braided into the shielding conductive tape by the production process.
In this embodiment, the conductive material, the semiconductor material, and the polymer composite material are respectively selected and woven into the shielding conductive tape through the production process, and the shielding conductive tape or the magnetic sheet material with various specifications, which is obtained by weaving the three materials, is installed at a proper position of the iron core coil of the transformer and in the available space inside and outside the housing (oil tank).
In this embodiment, in the second step, the multi-heddle (knitting) method needs to ensure that the tension of each thread is consistent during the warping, heddle transferring, knot transferring and knitting processes, and no broken warp exists;
a. in the production process, the mechanical intelligent monitoring avoids the occurrence of net body hard damage, crease marks, double lines, jumper wires, lack of warps and wefts, bulges, depressions, grooves, edges, sundries, oil stains, sweat stains and edge cracks at two sides, avoids sharp corner discharge and improves the product quality;
b. relaxing the meridians: ensuring that no net surface is higher than the net surface, so that the hole on the net surface is deformed and no parallel loose warps exist;
c. reversing the lines: the reverse line is required to be smooth and have no edge;
d. let-off: the weft delivering and cutting are both regulated by a servo motor through a computer, and the weft cutting time is adjusted, so that the weft is better clamped on the rapier head, and the net surface is kept flat;
e. wire sorting: no lines can appear on the surface of the net body.
In this embodiment, the installation range of the shielding conductive tape or the magnetic sheet material includes: the transformer core coil is installed in a proper position of the transformer core coil and available space inside and outside the shell (oil tank) singly or in a matching way.
The working principle of the invention is as follows: the transformer parts have sharp corners and burrs, which cause electric field distortion, thereby causing partial discharge. Electromagnetic waves, light, and local overheating may also be generated during the partial discharge process. For this kind of discharge, the present invention provides a conductive strip with a shielding function. The novel conductive material is combined with the high polymer material, so that the conductive material has high conductivity and shielding efficiency, has the characteristics of high temperature resistance, oxidation resistance and corrosion resistance, and is an ideal material for shielding various high-voltage electrical products; the shielding conductive band has the following advantages through a special weaving process:
1) the acid resistance, alkali resistance and rust resistance are good;
2) the strength is high, the tensile force, toughness and wear resistance are strong, and the durability is realized;
3) high temperature oxidation resistance and normal temperature processing, namely easy plastic processing, so that the use possibility of the shielding conductive net is diversified;
4) the conductive layer can also have the functions of semi-conduction and insulation. (customized according to customer requirements);
5) meets the requirement of environmental protection;
6) the length can be customized to any length;
7) the mechanical production, the product quality is easy to control, and the product is neat and beautiful.
The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A conductive belt production process and application for a shielding function of a power transformer are characterized in that: the production process comprises the following specific steps:
the method comprises the following steps: selecting materials: selecting one or more of conductive material, semiconductor material and polymer synthetic material;
step two: inspecting the line; detecting the special metal material by using a detection instrument, wherein the detection range comprises the thickness of the wire diameter and the soft and hard tension indexes, and according to the requirements of the capacity and the magnetic flux of the transformer, conductive belts with shielding functions and magnetic plates with various specifications are made for transformers with different materials, different wire diameters and different densities;
step three: warping; selecting bobbins with consistent wire diameters and consistent tension from the qualified wire rods detected in the step two for warping, keeping the tension of each bobbin the same in the warping process, keeping the tension roller smooth, rotating flexibly and avoiding friction in the warping link;
step four: checking whether the cleanliness and the smoothness of a wire supporting roller, a hump and a wire collecting roller of the machine reach the standard or not;
step five: a step of heald and buckle transmission; in the process of heald and buckle delivering, the weaving line runs smoothly on the weaving machine, and the phenomena of line pressing, diagonal pulling, line fixing and knotting are avoided;
step six: weaving production; a multi-heald weaving (knitting) method is adopted, and a loom interweaves warps and wefts in production according to a certain rule; weaving the original warp and weft into multi-layer, reciprocating and knitted conductive bands or producing and processing into magnetic plates with various specifications;
step seven: mounting a finished product; the shielding conductive belt or the magnetic plate is installed at a proper position of the transformer iron core coil and in available space inside and outside the shell (oil tank) singly or in a matching way by adopting one or more of covering, shielding, embedding and hanging methods.
2. The production process and the application of the conductive belt with the shielding function for the power transformer as claimed in claim 1 are characterized in that: conductive fibers can also be selected to be made into the conductive belt by blended yarn weaving.
3. The production process and the application of the conductive belt with the shielding function for the power transformer as claimed in claim 1 are characterized in that: meanwhile, conductive materials, semiconductor materials and polymer synthetic materials are selected and twisted into the conductive belt or the magnetic plate through the production process.
4. The production process and application of the conductive belt for the shielding function of the power transformer as claimed in claim 1 are characterized in that: conductive strips are woven by respectively selecting conductive materials, semiconductor materials and polymer synthetic materials through the production process, and the conductive strips or magnetic plates with various specifications, which are woven by the three materials, are independently or cooperatively arranged at proper positions of the transformer core coil and in available spaces inside and outside the shell (oil tank).
5. The production process and the application of the conductive belt with the shielding function for the power transformer as claimed in claim 1 are characterized in that: in the second step, the multi-heddle (knitting) method needs to ensure that the tension of each thread is consistent in the warping, heddle transferring, knot transferring and knitting processes, and no broken warp exists;
a. in the production process, the mechanical intelligent monitoring avoids the occurrence of net body hard damage, crease marks, double lines, jumper wires, lack of warps and wefts, bulges, depressions, grooves, edges, sundries, oil stains, sweat stains and edge cracks at two sides, avoids sharp corner discharge and improves the product quality;
b. relaxing the meridians: ensuring that no net surface is higher than the net surface, so that the hole on the net surface is deformed and no parallel loose warps exist;
c. reversing the lines: the reverse line is required to be smooth and have no edge;
d. let-off: the weft delivering and cutting are both regulated by a servo motor through a computer, and the weft cutting time is adjusted, so that the weft is better clamped on the rapier head, and the net surface is kept flat;
e. wire sorting: no lines can appear on the surface of the net body.
6. The production process and application of the conductive belt for the shielding function of the power transformer as claimed in claim 1 are characterized in that: the installation range of the shielding conductive belt or the magnetic sheet material comprises: the transformer core coil is installed in a proper position of the transformer core coil and available space inside and outside the shell (oil tank) singly or in a matching way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110711183.8A CN113470955A (en) | 2021-06-25 | 2021-06-25 | Production process and application of conductive belt with shielding function for power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110711183.8A CN113470955A (en) | 2021-06-25 | 2021-06-25 | Production process and application of conductive belt with shielding function for power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113470955A true CN113470955A (en) | 2021-10-01 |
Family
ID=77872994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110711183.8A Pending CN113470955A (en) | 2021-06-25 | 2021-06-25 | Production process and application of conductive belt with shielding function for power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113470955A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189113A (en) * | 2021-12-01 | 2022-03-15 | 特变电(沈阳)电工新材料有限公司 | Material and manufacturing process of iron core and magnetic shielding body of power transformer |
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|---|---|---|---|---|
| JP2001267148A (en) * | 2000-01-14 | 2001-09-28 | Denken Seiki Kenkyusho:Kk | Disturbance cut-off transformer |
| US20080211611A1 (en) * | 2005-04-01 | 2008-09-04 | Siemens Aktiengesellschaft | Transformer with Electrical Shield |
| CN101299378A (en) * | 2008-02-29 | 2008-11-05 | 西安交通大学 | Application of flexible magnetic material for producing magnetic core of printed circuit board transformer |
| CN202678070U (en) * | 2012-06-25 | 2013-01-16 | 中国西电电气股份有限公司 | Yoke shield of converter transformer and shielding structure of yoke shield |
| CN104157430A (en) * | 2014-08-14 | 2014-11-19 | 中国西电电气股份有限公司 | Lower-iron-yoke shielding structure of transformer and manufacturing technology of lower-iron-yoke shielding structure of transformer |
| CN104737636A (en) * | 2012-08-24 | 2015-06-24 | 世联株式会社 | Magnetic field-shielding electromagnetic shielding material |
| CN108746331A (en) * | 2018-05-29 | 2018-11-06 | 江西省科学院应用物理研究所 | Non-crystaline amorphous metal braid over braid and its preparation method and application |
| CN111916266A (en) * | 2020-08-06 | 2020-11-10 | 沈阳市曙光网业有限公司 | Material of nonmetal pad net for manufacturing electrical insulating plate and manufacturing process |
-
2021
- 2021-06-25 CN CN202110711183.8A patent/CN113470955A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| JP2001267148A (en) * | 2000-01-14 | 2001-09-28 | Denken Seiki Kenkyusho:Kk | Disturbance cut-off transformer |
| US20080211611A1 (en) * | 2005-04-01 | 2008-09-04 | Siemens Aktiengesellschaft | Transformer with Electrical Shield |
| CN101299378A (en) * | 2008-02-29 | 2008-11-05 | 西安交通大学 | Application of flexible magnetic material for producing magnetic core of printed circuit board transformer |
| CN202678070U (en) * | 2012-06-25 | 2013-01-16 | 中国西电电气股份有限公司 | Yoke shield of converter transformer and shielding structure of yoke shield |
| CN104737636A (en) * | 2012-08-24 | 2015-06-24 | 世联株式会社 | Magnetic field-shielding electromagnetic shielding material |
| CN104157430A (en) * | 2014-08-14 | 2014-11-19 | 中国西电电气股份有限公司 | Lower-iron-yoke shielding structure of transformer and manufacturing technology of lower-iron-yoke shielding structure of transformer |
| CN108746331A (en) * | 2018-05-29 | 2018-11-06 | 江西省科学院应用物理研究所 | Non-crystaline amorphous metal braid over braid and its preparation method and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189113A (en) * | 2021-12-01 | 2022-03-15 | 特变电(沈阳)电工新材料有限公司 | Material and manufacturing process of iron core and magnetic shielding body of power transformer |
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Application publication date: 20211001 |